You want your "My Page" to be personal -- but you don't want to go to a lot of extra work of writing all your blog posts here and there -- well, you don't have to! Using the RSS feature, you can add your personal blog posts, your Twitter Feed, your Friend Feed or any RSS directly to your "My Page".
First, go to your "My Page" and find the RSS Feed box. The default location is on the left hand side. You can drag it anywhere you want it on the page. (Check out this post for directions on customizing your "My Page", so that you can have this content show up where ever you want.)
Click on the right hand side, on the "Edit" button, to open the RSS feed menu. From there, simply fill in the blanks and hit "Save".